PL
IA
N
Features
■
Two channel quadrature output
■
Bushing or servo mount
■
Square wave signal
■
Small size
■
Resolution to 256 PPR
■
CMOS and TTL compatible
■
Long life
■
Ball bearing option for high operating
CO
M
T
speed up to 3000 rpm
■
RoHS compliant*
*R
oH
S
EN - Rotary Optical Encoder
Electrical Characteristics
Output ................................................................................... 2-bit quadrature code, Channel A leads Channel B by 90 º (electrical) with clockwise rotation
Resolution............................................................................................................................................................................... 25 to 256 cycles per revolution
Insulation Resistance (500 VDC) .................................................................................................................................................................. 1,000 megohms
Electrical Travel .....................................................................................................................................................................................................Continuous
Supply Voltage.........................................................................................................................................................................................5.0 VDC ±0.25 VDC
Supply Current.............................................................................................................................................................................................. 26 mA maximum
Output Voltage
Low Output .................................................................................................................................................................................................0.8 V maximum
High Output.....................................................................................................................................................................................................4 V minimum
Output Current
Low Output ................................................................................................................................................................................................ 25 mA minimum
Rise/Fall Time ..................................................................................................................................................................................................200 ns (typical)
Shaft RPM (Ball Bearing) ....................................................................................................................................................................... 3,000 rpm maximum
Power Consumption ..................................................................................................................................................................................136 mW maximum
Pulse Width (Electrical Degrees, Each Channel) ............................................................................................................................................180 º ±45 º typ.
Pulse Width (Index Channel) ................................................................................................................................................................................. 360 º ±90 º
Phase (Electrical Degrees, Channel A to Channel B)........................................................................................................................................90 º ±45 º typ.
Environmental Characteristics
Operating Temperature Range .......................................................................................................................................-40 ºC to +75 ºC (-40 °F to +167 °F)
Storage Temperature Range ..........................................................................................................................................-40 °C to +85 °C (-40 °F to +185 °F)
Humidity................................................................................................................................................................. MIL-STD-202, Method 103B, Condition B
Vibration ............................................................................................................................................................................................................................ 5 G
Shock............................................................................................................................................................................................................................... 50 G
Rotational Life
A & C Bushings (300 rpm maximum)** ............................................................................................................................................10,000,000 revolutions
W, S & T Bushings (3,000 rpm maximum)** ..................................................................................................................................200,000,000 revolutions
IP Rating ..........................................................................................................................................................................................................................IP 40
Mechanical Characteristics
Mechanical Angle ........................................................................................................................................................................................ 360 ° Continuous
Torque (Starting and Running)
A & C Bushings (Spring Loaded for Optimum Feel) ..............................................................................................................1 N-cm (1.5 oz-in.) maximum
W, S & T Bushings (Ball Bearing Shaft Support) ..............................................................................................................0.07 N-cm (0.1 oz-in.) maximum
Mounting Torque .................................................................................................................................................... 1.7 to 2.0 N-m (15 to 18 lb.-in.) maximum
Shaft End Play .................................................................................................................................................................. 0.30 mm (0.012 ˝) T.I.R. maximum
Shaft Radial Play .............................................................................................................................................................. 0.12 mm (0.005 ˝) T.I.R. maximum
Weight .......................................................................................................................................................................................................... 11 gms. (0.4 oz.)
Terminals ......................................................................................................................................................................Axial or radial pc pins or ribbon cable
Soldering Condition
Manual Soldering ................................................................................................................... 96.5Sn/3.0Ag/0.5Cu solid wire or no-clean rosin cored wire
370 °C (700 °F) max. for 3 seconds
Wave Soldering ...........................................................................................................................................96.5Sn/3.0Ag/0.5Cu solder with no-clean flux
260 °C (500 °F) max. for 5 seconds
Wash processes .................................................................................................................................................................................... Not recommended
Marking .................................................................................................................................Manufacturer’s trademark, name, part number, and date code.
Hardware ................................................................. One lockwasher and one mounting nut supplied with each encoder, except on servo mount versions.
**For resolutions
≤
128 quadrature cycles per shaft revolution.
Quadrature Output Table
OUTPUT VOLTAGE
Channel A
Channel B
1 cycle
360
° ±
90
°
Clockwise rotation
STANDARD RESOLUTIONS AVAILABLE
(Full quadrature output cycles per shaft revolution)
25*
125
50*
128
64
200
100
256
For Non-Standard Resolutions—Consult Factory
* Channel B leads Channel A
WARNING
Cancer and Reproductive Harm
www.P65Warnings.ca.gov
*RoHS Directive 2015/863, Mar 31, 2015 and Annex.
Specifications are subject to change without notice. Users should verify actual device performance in their specific
applications. The products described herein and this document are subject to specific legal disclaimers as set forth on the
last page of this document, and at
www.bourns.com/docs/legal/disclaimer.pdf.
GENERAL INFORMATION
The Bourns
®
EN model is a self-contained rotary optical encoder.
It produces a 2-bit quadrature signal which is suitable for digital
systems where both magnitude and direction of adjustment must
be provided. The EN encoder is ideal for use as a digital panel
control or as a position sensing device in applications where long
life, reliability, high resolution and precise linearity are critical.
The EN series encoder converts rotary input into electrical signals
which can be used by microprocessors without A/D conversion.
Bourns encoder output signals are square wave digital pulses which
do not require debounce circuitry. Both features make it possible
to significantly reduce the memory overhead, wiring and wiring inter-
connects required by other types of control devices.
EN optical encoders offer a useful rotational life of from 10 million to
200 million shaft revolutions, making them ideal for extended service
applications. The Bourns encoder is also compact and well suited for
situations where the available space is limited.
EN - Rotary Optical Encoder
How To Order
BOURNS EN SERIES OPTICAL ENCODER
E N C 1 J - D 2 8 - L 0 0 1 2 8 L
ANTI-ROTATION
LUG POSITION
Code Description
None
D
9:00 Position
J
Rear Mount-
P
ing Bracket
SWITCHING
CONFIGURATION
Code Description
Channel A
Leads
Channel B
1
By 90
°
(Clockwise
Rotation)**
SHAFT LENGTH*
Code Description
1/2 ˝ Long
16
5/8 ˝ Long
20
3/4 ˝ Long
24
7/8 ˝ Long
28
TERMINAL***
CONFIGURATION
Code Description
L
Axial, Multi-
Purpose Pin
R
Radial, Multi-
Purpose Pin
Axial, Ribbon
M
& Connector
10 ˝
Radial, Ribbon
N
& Connector
10 ˝
Axial, Ribbon
W
10 ˝ -
No Connector
Radial, Ribbon
Y
10 ˝ -
No Connector
SHAFT STYLE
RoHS IDENTIFIER
Code Description
Compliant
L
RESOLUTION
Cycles Per
Code Revolution
25
00025
00050
50
64
00064
100
00100
125
00125
128
00128
200****
00200
256****
00256
Code
B
D
C
Description
1/4 ˝ Dia., Plain End
1/8 ˝ Dia., Plain End
1/4 ˝ Dia., Single
Flatted
Use With
Bushings (Code)
A, S
C, T, W
A, S
BUSHING CONFIGURATION
Code Description
A
3/8 ˝D X 3/8 ˝L Threaded
C
1/4 ˝D X 1/4 ˝L Threaded
S
3/8 ˝D X 3/8 ˝L Threaded
(Ball Bearing)
1/4 ˝D X 3/8 ˝L Threaded
T
(Ball Bearing)
Servo Mount 7/8 ˝D
W
(Ball Bearing)
* Shaft length measured from mounting surface.
** 25 and 50 PPR is reversed (Channel B leads Channel A).
*** Standard ribbon cable is 10 ˝ long. Consult factory for other lengths.
**** Available with S, T, and W bushing configuration only.
REV. 09/19
Specifications are subject to change without notice.
Users should verify actual device performance in their specific applications.
The products described herein and this document are subject to specific legal disclaimers as set forth on the last page of this document, and at
www.bourns.com/docs/legal/disclaimer.pdf.
Legal Disclaimer Notice
This legal disclaimer applies to purchasers and users of Bourns
®
products manufactured by or on behalf of Bourns, Inc. and
Unless otherwise expressly indicated in writing, Bourns
®
products and data sheets relating thereto are subject to change
and complete before placing orders for Bourns
®
products.
The characteristics and parameters of a Bourns
®
product set forth in its data sheet are based on laboratory conditions, and
statements regarding the suitability of products for certain types of applications are based on Bourns’ knowledge of typical
requirements in generic applications. The characteristics and parameters of a Bourns
®
®
product with other components
the actual performance of the Bourns
®
®
®
product as meeting the requirements of a particular industry
®
of Bourns products are responsible for ensuring compliance with safety-related requirements and standards applicable to
®
Bourns
®
on a case-by-case basis, use of any Bourns
®
®
®
®
®
Bourns
®
®
standard products that are suitable for use in aircraft
®
standard
the user’s sole risk.
®
and the user for which such Bourns
®
®
custom products shall be negotiated on a case-by-case basis by Bourns
®
also apply to such Bourns custom products.
Users shall not sell, transfer, export or re-export any Bourns
®
Bourns
®
standard products shall
products and Bourns technology and technical data may not under any circumstance be
exported or re-exported to countries subject to international sanctions or embargoes. Bourns
®
products may not, without
®
bilingual versions are available at:
Web Page:
http://www.bourns.com/legal/disclaimers-terms-and-policies
PDF:
http://www.bourns.com/docs/Legal/disclaimer.pdf
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